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Connecting to a Data Source in ADO.NET
03/30/2017
.net-framework
dotnet-ado
article
9abc3f92-1be3-4e1a-b360-762dc689650e
3
JennieHubbard
jhubbard
jhubbard

Connecting to a Data Source in ADO.NET

In ADO.NET you use a Connection object to connect to a specific data source by supplying necessary authentication information in a connection string. The Connection object you use depends on the type of data source.

Each .NET Framework data provider included with the .NET Framework has a xref:System.Data.Common.DbConnection object: the .NET Framework Data Provider for OLE DB includes an xref:System.Data.OleDb.OleDbConnection object, the .NET Framework Data Provider for SQL Server includes a xref:System.Data.SqlClient.SqlConnection object, the .NET Framework Data Provider for ODBC includes an xref:System.Data.Odbc.OdbcConnection object, and the .NET Framework Data Provider for Oracle includes an xref:System.Data.OracleClient.OracleConnection object.

In This Section

Establishing the Connection
Describes how to use a Connection object to establish a connection to a data source.

Connection Events
Describes how to use an InfoMessage event to retrieve informational messages from a data source.

See Also

Connection Strings
Connection Pooling
Commands and Parameters
DataAdapters and DataReaders
Transactions and Concurrency
ADO.NET Managed Providers and DataSet Developer Center